The idea is that you will be able to search Siri for a movie or actor, and see related content from a host of sources, like Netflix, Hulu, and the iTunes Store.

Other set-top boxes that plug into your TV and allow you to stream video online, from companies like Roku and Amazon, already have similar features.

Apple's upgraded set-top box, which would be the first major update to its Apple TV since 2012, is also expected to run its own version of the App Store, have a faster processor, and come with a new, touchscreen remote.

Gurman cautions that Apple, however, "may wait to integrate the new search features until the Apple TV is populated with third-party applications."

The official Roku mobile app lets you search for specific shows and movies. Roku